Datasheet SHT21

www.sensirion.com / D1

Version 5 – October 2022

11/14

7 Environmental Stability

The SHT2x sensor series were tested based on AEC-

Q100 Rev. G qualification test method where applicable.

Sensor specifications are tested to prevail under the AEC-

Q100 temperature grade 1 test conditions listed in Table

915.

Environment Standard

Results16

HTOL

125°C, 408 hours

Pass

TC

-50°C - 125°C, 1000 cycles

Pass

UHST

130°C / 85 %RH / ≈2.3 bar, 96 h

Pass

THB

85°C / 85 %RH, 1000 h

Pass

HTSL

150°C, 1000h

Pass

ELFR

125°C, 48h

Pass

ESD immunity HBM 4 kV, MM 200 V, CDM

750V/500V (corner/other pins)

Pass

Latch-up

force current of ±100 mA with Tamb

= 125°C

Pass

Table 9: Performed qualification test series. HTOL = High

Temperature Operating Lifetime, TC = Temperature Cycles,

UHST = Unbiased Highly accelerated Stress Test, THB =

Temperature Humidity Biased, HTSL = High Temperature

Storage Lifetime, ELFR = Early Life Failure Rate. For details on

ESD see Sect.4.1.

Sensor performance under other test conditions cannot be

guaranteed and is not part of the sensor specifications.

Especially, no guarantee can be given for sensor

performance in the field or for customer’s specific

application.

If sensors are qualified for reliability and behavior in

extreme conditions, please make sure that they

experience same conditions as the reference sensor. It

should be taken into account that response times in

assemblies may be longer, hence enough dwell time for

the measurement shall be granted. For detailed

information please consult Application Note “Testing

Guide”.

8 Packaging

8.1 Packaging Type

SHT2x sensors are provided in DFN packaging (in

analogy with QFN packaging). DFN stands for Dual Flat

No leads.

The sensor chip is mounted to a lead frame made of Cu

and plated with Ni/Pd/Au. Chip and lead frame are over

molded by green epoxy-based mold compound. Please

note that side walls of sensors are diced and hence lead

15 Temperature range is -40 to 125°C (AEC-Q100 temperature grade 1).

16 According to accuracy and long term drift specification given on Page 2.

frame at diced edge is not covered with respective

protective coating. The total weight of the sensor is 25 mg.

8.2

Filter Cap and Sockets

For SHT2x a filter cap SF2 will is available. It is designed

for fast response times and compact size. Please find the

datasheet on Sensirion’s web page.

For testing of SHT2x sensors sockets, such as from

Plastronics,

part

number

10LQ50S13030

are

recommended.

8.3

Traceability Information

All SHT2x are laser marked with an alphanumeric, five-

digit code on the sensor – see Figure 21.

The marking on the sensor consists of two lines with five

digits each. The first line denotes the sensor type

(SHT21). The first digit of the second line defines the

output mode (D = digital, Sensibus and I2C, P = PWM, S =

SDM). The second digit defines the manufacturing year (0

= 2010, 1 = 2011, etc.). The last three digits represent an

alphanumeric tracking code. That code can be decoded by

Sensirion only and allows for tracking on batch level

through production, calibration and testing – and will be

provided upon justified request.

Figure 21 Laser marking on SHT21. For details see text.

Reels are also labeled, as displayed in Figure 22 and

Figure 23, and give additional traceability information.

Figure 22: First label on reel: XX = Sensor Type (21 for SHT21),

O = Output mode (D = Digital, P = PWM, S = SDM), NN =

product revision no., Y = last digit of year, RRR = number of

sensors on reel divided by 10 (200 for 2000 units), TTTTT =

Traceability Code.

SHT21

D0AC4

Lot No.:

XXO-NN-YRRRTTTTT

Quantity:

RRRR

RoHS:

Compliant

Lot No.